Finally!

According to this article, Google Android will surpass Microsoft Windows in terms of number of units shipped in 2016.  From the article:

"By 2016, devices running Windows will be eclipsed by phones and tablets running Google's Android, according to a report by analysts IDC.

More than 90 per cent of the world's PCs still run Windows - but the whole technology landscape is changing around Microsoft's operating system.

By 2016, Microsoft's leading market share of 35.9% [in 2011] will slip to 25.1%. Devices running Google's Android will climb from 29.4% to 31.1%."

Smartphones will show the greatest growth, growing from 916 million shipped last year, to a predicted 1.84 billion units in 2016.